A car bomb has exploded outside the police headquarters in Egypt’s capital, killing four people and wounding 51, Egypt’s health ministry has said.
The powerful blast was felt across Cairo and black smoke could be seen rising over the city centre.
A second blast a couple of hours later in another part of Cairo killed at least one person and wounded 15.
The BBC reports that the blasts come on the eve of the third anniversary of the start of the 2011 uprising.
The revolution brought about the removal of the country’s decades-long ruler Hosni Mubarak.
No group has said it was behind the attacks.
They came a day after five policemen were shot dead by two gunmen on motorcycles at a checkpoint in Beni Suef province, south of Cairo.
In the first incident, officials said a booby-trapped car exploded outside Cairo’s security directorate.
Gunfire was reportedly heard soon afterwards.
More than 30 ambulances raced to the scene. Most of the wounded are now in hospital, the health ministry said.
There was extensive damage to the large concrete building with debris strewn across the street.
Around six police officers sat on the pavement outside and wept, an Associated Press photographer said.
The nearby Islamic museum and the National Archives building were also damaged.